Accumulator



FIG. 1 is a perspective view of an accumulator showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown in the drawings illustrate portions of the accumulator that form no part of the claimed design. 

CLAIM The ornamental design for an accumulator, as shown and described. 